Abstract Co3O4-MoS2 nanocomposites (NCs) were deposited on titanium sheets at room temperature using a vacuum kinetic spray process and Co3O4 and MoS2 micro powders. Co3O4-MoS2 NCs/Ti electrodes were used as electrocatalysts for non-enzymatic detection of H2O2 in 0.1 M NaOH. X-ray photoelectron spectroscopy revealed an improvement in the synergy between various cobalt-based active sites and MoS2 species in all hybrid electrodes. Analysis of the amperometric response of H2O2 oxidation in 0.1 M NaOH revealed that titanium-modified electrodes with either nanostructured Co3O4 or Co3O4-MoS2 NCs exhibited a wide linear detection range of 20 μM to 1mM. A gradual increase in the amount of Co3O4 in the modified electrodes led to a reduction in charge-transfer resistance and the evolution of more electro-active sites at the working electrode surface, accompanied by an overall enhancement in detection sensitivity to a peak of 3000 μA·mM−1·cm−2 at a Co3O4 content of 75 wt.%. Besides, the titanium modified electrodes with Co3O4-MoS2 NCs exhibited high selectivity for H2O2 oxidation in 0.1 M NaOH.

中文翻译：

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使用真空动力学喷涂工艺轻松一步沉积 Co3O4-MoS2 纳米复合材料，用于非酶促 H2O2 传感

摘要 Co3O4-MoS2 纳米复合材料 (NCs) 在室温下使用真空动力学喷涂工艺和 Co3O4 和 MoS2 微粉沉积在钛片上。Co3O4-MoS2 NCs/Ti 电极用作电催化剂，用于非酶法检测 0.1 M NaOH 中的 H2O2。X 射线光电子能谱揭示了所有混合电极中各种钴基活性位点和 MoS2 物种之间的协同作用的改善。对 0.1 M NaOH 中 H2O2 氧化的电流响应分析表明，具有纳米结构 Co3O4 或 Co3O4-MoS2 NCs 的钛修饰电极表现出 20 μM 至 1mM 的宽线性检测范围。修饰电极中 Co3O4 量的逐渐增加导致电荷转移电阻的降低和工作电极表面更多电活性位点的演变，伴随着 Co3O4 含量为 75 wt.% 时检测灵敏度达到 3000 μA·mM-1·cm-2 峰值的整体增强。此外，具有 Co3O4-MoS2 NCs 的钛修饰电极在 0.1 M NaOH 中对 H2O2 氧化表现出高选择性。